Bonjour,
pa
x
5x
5x-4
pb
x+7
-2(x+7) = -2x -14
=>5x-4 = -2x-14
5x+2x = -14 +4
7x = -10
x= -10/7
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Bonjour,
pa
x
5x
5x-4
pb
x
x+7
-2(x+7) = -2x -14
=>5x-4 = -2x-14
5x+2x = -14 +4
7x = -10
x= -10/7